WO2018070696A1

WO2018070696A1 - Bolt assembly having non-loosening nut

Info

Publication number: WO2018070696A1
Application number: PCT/KR2017/010565
Authority: WO
Inventors: 윤여빈; 김상일; 송경미
Original assignee: (주)파인드몰드
Priority date: 2016-10-13
Filing date: 2017-09-25
Publication date: 2018-04-19
Also published as: JP2019513960A; CN108474405A; US20190271351A1; KR101779060B1; EP3527835A1

Abstract

The present invention relates to a bolt assembly having a non-loosening nut and, more particularly, a bolt assembly having a non-loosening nut in which a pair of non-loosening nuts that move along a male thread pitch of a bolt are prepared so that the pair of non-loosening nuts press and spread to each side a pair of adjacent male threads of the bolt, thereby restricting the rotation of the bolt to suppress the loosening of the bolt. To this end, the present invention provides the bolt assembly having the non-loosening nut, the bolt assembly comprising: a bolt including a first male thread; a first nut, which has a first female thread screw-coupled to the first male thread of the bolt, and has, on the outer circumferential surface, a second male thread formed in the direction opposite to the first male thread; and a second nut, which has a second female thread that is screw-coupled to the second male thread of the first nut, and has, in the center, a non-loosening female thread which corresponds to the first female thread and is screw-coupled to the first male thread via the first female thread. The bolt assembly having the non-loosening nut is characterized in that the groove depth of the non-loosening female thread is formed deeper than the groove depth of the first male thread, thereby forming a gap between the first male thread and the non-loosening female thread, while preventing a gap from being formed between the first female thread and the first male thread.

Description

Bolt assembly with release lock nut

The present invention relates to a bolt assembly having an anti-loosening nut. More particularly, the present invention relates to a bolt assembly having an anti-loosening nut. Relates to a bolt assembly.

In general, bolts and nuts are used for fastening and assembling two or more separate objects into a single body, and are widely used in various fields such as automobile parts assembly, electronic parts assembly, and furniture assembly.

The conventional bolt and nut fastening structure is composed of a bolt that is fitted to the object to be fastened, and a nut that is screwed to the bolt.

In addition, the washer is inserted into close contact with the inside of the bolt and nut to improve the fastening force of the bolt and nut, and to prevent loosening by external shock and vibration.

In order to fasten the object to be fastened by the bolt and nut fastening structure as described above, the bolt is first passed through a fitting hole formed in the object to be fastened, and then the nut is screwed to the threaded portion of the bolt. .

Accordingly, the object to be fastened is fixed by bolts and nuts.

At this time, the washer is inserted into the bolt and nut, thereby

It will prevent loosening.

However, such a coupling structure of the bolt and nut has a problem that the fastening force of the nut from the bolt is easily released due to the external shock and vibration caused a weakening or loss of the fastening force on the fastened object, insert a washer to solve this problem However, the tightening force of the bolt and nut was maintained, but even in this case, the tightening force may be loosened after a long time, so that the tightening force of the bolt and the nut was completely maintained.

In order to solve this problem, recently, various technologies have been developed to prevent loosening after the bolt and nut are fastened.

For example, the Republic of Korea Patent Publication No. 1999-019896 of the bolt and grooved nut loosening prevention structure is formed with a plurality of fixing feet at the tip of the bolt body, the fixing nut is formed in the grooved nut so that the plurality of fixing feet can be fitted. As a result, when the bolt and the slotted nut are fastened to bend and fix the fixing foot, the fixing foot restrains the separation of the nut, thereby preventing loosening between the bolt and the nut.

However, the conventional bolt and nut loosening prevention structure has a complicated configuration, a series of processes for fastening and loosening the bolt and nut has been very troublesome.

In addition, the end of the bolt processing can be made by the additional production cost increase, there was a problem that the fixed foot durability due to the fixed foot bending.

In particular, after the nut is fastened, the process of bending a plurality of fixed feet one by one to increase the number of work, there was a problem of reducing work convenience and work productivity.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) Republic of Korea Publication No. 10-1999-019896

(Patent Document 2) Republic of Korea Registration No. 10-1625007

The present invention has been made in order to achieve the above object, the object of the present invention is fastened in a pair on the male thread of the bolt, a pair of nuts are loosened in the opposite direction of the bolt fastening direction to the male thread of the bolt Compression restrains the rotation of the bolt, preventing loosening of the bolt and nut for a long time without loosening or loosening the bolt and nut even after external shock or continuous vibration is applied after the bolt and nut are tightened. It is to provide a bolt assembly with a nut.

The present invention, in order to achieve the above object, a bolt comprising a first male thread; a first female thread screwed to the first male thread of the bolt is formed, the outer peripheral surface of the second in the opposite direction of the first male thread A first nut having a male thread formed therein; a second female thread formed by screwing the second male thread of the first nut is formed, and the first male thread is screwed through the first female thread in a center corresponding to the first female thread And a second nut formed with an anti-loosening female thread, wherein the bone depth of the anti-loosening female thread is formed deeper than the bone depth of the first male thread, so that a gap occurs between the first male thread and the anti-loosening female thread. It is configured to provide a bolt assembly having an anti-loosening nut, characterized in that no play occurs between the first female thread and the first male thread.

At this time, it is preferable that grooves and protrusions are formed on the opposite surfaces where the first nut and the second nut face each other.

At this time, it is preferable that the grooves and the protrusions are alternately formed at regular intervals in the circumferential direction of the anti-loosening nut.

The pitch of the second male thread is preferably shorter than the pitch of the first male thread.

At this time, the loosening nut is composed of an n-square, the second nut is preferably configured to be rotated 1 / n through the clearance between the first male thread and the second male thread pitch of the first nut.

Bolt assembly having an anti-loosening nut according to the present invention has the following effects.

First, a pair of anti-loosening nuts consisting of the first nut and the second nut is screwed into the male thread of the bolt, and the screwing direction between the first nut and the second nut is the male thread of the bolt. By being formed in the opposite direction to the fastened direction, the bolt and the anti-loosening nut have an effect that is not easily loosened with each other.

In particular, the bone depth of the loosening female thread formed on the second nut is formed deeper (overtap) than the bone depth formed on the first male thread of the bolt, so that a gap is generated between the first male thread and the anti-loosening female thread. By loosening the two nuts and separating the second nut from the first nut by the clearance, the anti-loosening female thread restricts the bolt from being rotated in the disengaging direction, which can be in close contact with the first male thread.

Accordingly, the bolt is prevented from being released from the loosening nut as much as possible, so that the coupling force between the bolt and the loosening nut can be maintained semipermanently.

Second, as the projections and grooves are formed on the opposite surfaces of the first nut and the second nut, when the anti-loosening female thread adheres to the first male thread through the rotation of the loosening of the second nut, the protrusions are compressed from the grooves to the opposite surface. As a result, restoring of the second nut can be suppressed as much as possible.

Accordingly, since the binding force of the anti-loosening nut compressing the male thread of the bolt may be increased, there is an effect of maximizing the anti-loosening of the bolt and nut.

Third, the pitch of the second male thread and the pitch of the second female thread are formed shorter than the pitch of the first male thread, so that the loosening rotation range of the second nut can be maximized.

Accordingly, by maximizing the distance between the projection and the groove, there is an effect that can be easily restrained that the projection is removed from the groove to the groove.

1 is an exploded perspective view showing a bolt assembly having an anti-loosening nut according to a preferred embodiment of the present invention

Figure 2 is a perspective view showing a bolt assembly having a loosening nut in accordance with a preferred embodiment of the present invention

Figure 3 is a cross-sectional view showing a bolt assembly having a loosening nut in accordance with a preferred embodiment of the present invention

4 is a perspective view illustrating a state in which a bolt assembly having a release preventing nut according to a preferred embodiment of the present invention is spaced apart from the first nut by rotating a second nut to prevent release;

5A and 5B illustrate a bolt assembly having an anti-loosening nut according to a preferred embodiment of the present invention, while the second nut is rotated to prevent the anti-loosening from being spaced apart from the first nut. Functional diagram showing the state of compressing male thread

6A and 6B are side views illustrating a rotation range in which a second nut is rotated to prevent loosening of a bolt assembly having a loosening nut according to a preferred embodiment of the present invention.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may properly define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Hereinafter, a bolt assembly (hereinafter referred to as a 'bolt assembly') having an anti-loosening nut according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 6B.

The bolt assembly has the technical feature of having a pair of anti-loosening nuts on the male thread of the bolt.

The anti-loosening nut is composed of a pair that is fastened on the screw thread of the bolt separately from the fastening with the bolt, and constrains the bolt's rotation by compressing the male thread by using the action that occurs while the pair of anti-loosening nut is loosened. Loosening can be suppressed.

As shown in FIG. 1, the bolt assembly includes a bolt 100 and a release preventing nut 200.

The bolt 100 is fastened with the release preventing nut 200 to serve to fix the object to be fastened.

The bolt 100 is composed of a head portion 110 and a screw portion 120 as shown in FIG.

The head portion 110 is a portion for using a tool, and may be provided in various forms.

In the present specification, although illustrated in a hexagonal form for convenience of description, the present invention is not limited thereto.

In addition, although the head unit 110 is illustrated for convenience of description, the head unit 110 is not necessarily configured.

The screw portion 120 is a portion that is screwed with the loosening prevention nut 200 and extends from the head portion 110.

The threaded portion 120 is formed with a male thread, and the thread forming direction thereof is not limited.

In the present specification, the right thread is formed as an example, and the first male thread 121 will be referred to for clarity of explanation.

Next, the anti-loosening nut 200 is screwed with the bolt 100 to fix the object to be fastened, it is composed of a pair.

The pair of anti-loosening nut 200 is spaced apart from each other on the first male thread 121 of the bolt 100 to compress the first male thread 121 of the bolt 100 to rotate the bolt 100. By restraining, it serves to suppress the loosening phenomenon with the nut due to the rotation of the bolt (100).

The anti-loosening nut 200 is configured as a pair as described above, and will be referred to as a first nut 210 and a second nut 220 to help understand the description.

The first nut 210 constitutes one side of the anti-loosening nut 200, and a screw hole in which a first female thread 201 is formed in the center thereof is fastened to the bolt 100, and a second nut is formed on the outer circumferential surface of the screw hole. Male thread mountain 211 is formed.

The first female thread 201 corresponds to the first male thread 121 of the bolt 100, and is designed so that a gap does not occur between the first male thread 201 and the first female thread 201. It can be firmly combined.

The second male thread 211 is a portion formed for screwing the second nut 220, and a thread forming direction thereof is formed in a direction opposite to the screw forming direction of the first male thread 121.

That is, the second male thread 211 is formed as an inverse thread with respect to the screw direction of the first male thread 121.

In the example that the first male thread 121 is a right screw, the second male thread 211 is formed to be a left screw.

The second male thread 211 is configured to move on the first male thread 121 of the bolt 100 through the loosening rotation of the second nut 220 together with the screwing of the second nut 220. .

That is, when the second nut 220 is rotated to one side, the first nut 210 is tight while being tightly coupled, and when the second nut 220 is rotated to the other side, the first nut 210 is released from the first nut 210. It is configured to be moved from the first male thread 121 of the bolt 100 is spaced apart from the).

On the other hand, the pitch of the second male thread 211 is formed shorter than the pitch of the first male thread 121 of the bolt 100.

This is to ensure the maximum rotation range of the second nut 220.

That is, by shortening the pitch of the second male thread 211, the rotation range of the second nut 220 is maximized, so that the protrusions to be described later can be moved away from the groove as much as possible.

Detailed description thereof will be described later.

In the present specification, for convenience of description, when the anti-loosening nut 200 is taken as an example of a hexagon, a plurality of grooves 212a are formed on the hexagonal first facing surface 212 formed on the first nut 210.

The groove 212a is to prevent the protrusion 222a described below from interfering with the first opposing surface 212 so that the first nut 210 and the second nut 220 are in close contact with each other. .

The depth of the recess 212a is formed to correspond to the protruding length of the protrusion 222a, and the position of the recess 212a is preferably alternately formed at a portion corresponding to the angle of the first opposing surface 212. Do.

Meanwhile, the second nut 220 constitutes the other side of the loosening prevention nut 200, and a second female thread 221 is formed at the center thereof for screwing with the first nut 210. In the center in which 221 is formed, an anti-loosening female thread 221a for screwing the first male thread 121 is formed.

The second female thread 221 is configured to be screwed with the second male thread 211 of the first nut 210, and the screw-like direction of the second female thread 221 is also formed as a reverse thread.

Further, since the pitch of the second female thread 221 corresponds to the pitch of the second male thread 211, it is natural that the pitch of the second female thread 221 is shorter than that of the first male thread 121.

That is, due to the pitch design of the second female thread 221, the rotation range of the second nut 220 can be maximized.

The pitch design of the second female thread 221 and the second male thread 211 is designed such that the second nut 220 can be rotated 1/6 in addition to the bone depth of the anti-loosening female thread 221a which will be described later. This is preferred.

That is, when considering the short pitch of the second female thread 221 and the second male thread 211 and the bone depth design of the anti-loosening female thread 221a to be described later, the anti-loosening nut 200 is hexagonal. , The rotation of the second nut 220 is preferably designed to be 1/6.

Then, the loosening female thread 221a is screwed with the first male thread 121 of the bolt 100 passing through the first female thread 201 of the first nut 210, and the bolt 100 is loosened. It serves to suppress.

The bone formed by the anti-loosening female thread 221a is formed deeper than the depth of the bone formed by the first male thread 121, as shown in FIG. 3.

As such, the bone depth of the anti-loosening female thread 221a and the bone depth of the first male thread 121 are generated. As can be seen from FIG. 3, the first male thread 121 and the anti-loosening female thread 221a are separated from each other. Free play will occur.

Due to the formation of the clearance, the movement distance of the second nut 220 as much as the clearance is secured.

That is, since a space in which the second nut 220 can be moved to the left side in the drawing (FIG. 3) is secured, the second nut 220 is rotated through the unwinding rotation of the second nut 220 from the first nut 210. ) Is moved on the first male thread 121 and the anti-loosening female thread 221a may constrain the rotation of the bolt 100 by compressing the first male thread 121.

Since the rotation of the bolt 100 is constrained as described above, the loosening of the bolt 100 from the loosening prevention nut 200 can be suppressed.

On the other hand, the bone depth of the anti-loosening female screw thread 221a is preferably formed so that the loosening range of the second nut 220 for the movement of the second nut 220 is 1 / 2n.

That is, in the present specification, when the anti-loosening nut 200 is hexagonal, the bone depth of the anti-loosening female thread 221a is to allow the second nut 220 to be rotated 1/12 of a turn.

Accordingly, as described above, the technical characteristics of the bone depth of the anti-loosening female thread 221a and the technical characteristics of the short pitch of the second male thread 211 are added to the rotation of the second nut 220 by 1. / n, that is, configured to rotate 1/6 of a turn.

And the protrusion 222a which is inserted into the groove 212a of the first nut 210 is formed in the second opposing surface 222 of the second nut 220.

The protrusion 222a maximizes the force that the pair of anti-loosening nuts 200 are spaced apart and the anti-loosening female thread 221a, which restricts the rotation of the bolt 100, compresses the first male thread 121. The second nut 220 is configured to suppress the restoration to the maximum.

That is, the protrusion 222a is pressed against the first facing surface 212 of the first nut 210 to push the second nut 220 further from the first nut 210 by the length of the protrusion 222a. Therefore, the compressive force of the anti-loosening female thread 221a compressing the first male thread 121 is maximized, thereby reinforcing the rotational constraint of the bolt 100.

In addition, since the protrusion 222a compresses the first opposing surface 212, the deterrent force is exerted so that the second nut 220 is not easily rotated.

The protrusions 222a are formed to protrude from the second opposing surface 222, and are alternately formed at portions corresponding to the angles of the second opposing surface 222.

That is, it is preferable that three protrusions 222a are formed on the second opposing surface 222 having a hexagonal shape, but the number and position thereof are not limited.

Hereinafter, the coupling and the action of the bolt assembly having the above configuration will be described.

After inserting the second male thread 211 of the first nut 210 into the second female thread 221 of the second nut 220, the loosening prevention nut 200 is provided by rotating and fastening in a left direction. .

Next, the bolt 100 passes through the through hole formed in the object to be fastened (not shown), and as shown in FIG. 2, the release preventing nut 200 is fastened to the end of the bolt 100.

At this time, the first male thread 211 of the bolt 100 is inserted into the first female thread 201 of the anti-loosening nut 200 and then rotated in a right direction to be fastened.

As can be seen through this, since the screw fastening direction between the anti-loosening nut 200 and the screw fastening direction between the bolt 100 and the anti-loosening nut 200 can be seen to be opposite, the directions of mutual loosening are also opposite to each other. Loosening can be suppressed.

In addition, the protrusion 222a formed in the second nut 220 is inserted into the recess 212a formed in the first nut 210, thereby allowing the first nut 210 to be formed on the first male thread 121 of the bolt 100. And the second nut 220 are in close contact with each other.

At this time, the first male thread 121 of the bolt 100 corresponds exactly to the first female thread 201, as shown in FIGS. 3 and 5A, but the bone depth of the female thread 221a is prevented from loosening. It can be seen that the gap is caused by the difference.

On the other hand, in this state, the second nut 220 is rotated in the release direction.

As the second nut 220 is rotated in the release direction as described above, the second nut 210 is separated from the first nut 210 while being spaced apart from the first nut 210 as illustrated in FIGS. 4 and 6. The inserted protrusion 222a is in close contact with the first opposing surface 212 away from the groove 212a to maintain a spaced state between the first nut 210 and the second nut 220.

At this time, as shown in FIGS. 5A and 5B, the loosening female thread 221a of the second nut 220 is moved in the releasing direction to compress the neighboring first male thread 121.

This is the rotation of the bolt 100 is constrained as the second nut 220 is opened by a clearance distance from the first nut 210 through the loosening rotation, by pushing the first male screw 121 is compressed.

Even if external vibration is applied to the bolt assembly, the bolt 100 attempts to loosen in the left direction and the second nut 220 attempts to loosen in the right direction, thereby preventing the loosening female thread 221a from the first male thread 211. ) Will not be released.

In particular, since the protrusion 222a is brought out of the groove 212a and brought into close contact with the first opposing surface 212 as shown in FIGS. 4 and 5B, the second nut 220 has a length of the protrusion 222a. As much as the first nut 210 is spaced apart from each other, the anti-loosening female thread mountain 221a can be maximized in close contact with the first male thread mountain 211.

In addition, the pitch of the second male thread 211 and the second female thread 221 is formed to be shorter than the pitch between the first male thread 121 and the first female thread 201, thereby preventing the loosening female thread. The range of rotation of the second nut 220 can be maximized along with the technical features for the bone depth of 221a, as shown in FIGS. 6A and 6B to make 1/6 turns.

In this way, since the return distance to the grooves 222a to the grooves 212a is the maximum state, the projections 222a are not easily returned to the grooves 212a even during external vibration.

Accordingly, since the bolt 100 and the loosening nut 200 are not easily loosened, the fastening force of the bolt 100 and the loosening nut 200 can be maintained for a long time.

As described so far, the bolt assembly having an anti-loosening nut according to the present invention has a technical feature provided with a pair of anti-loosening nuts which can be moved on the male thread of the bolt.

Accordingly, the rotation of the bolt is constrained as the female thread of the loosening nut is pressed against and pushed out of the male thread, thereby preventing the bolt from loosening.

In particular, by forming projections and grooves between the pair of anti-loosening nuts, it is possible to maximize the force for pressing the male thread by applying a force to push the pair of anti-loosening nuts to prevent the bolts from loosening. Through this fastening force can be maintained for a long time.

Although the present invention has been described in detail with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the present invention, and such modifications and variations are obviously belonging to the appended claims.

[Description of the code]

100: bolt 110: head

120: screw portion 121: first male thread

200: loosening nut 201: first female thread

210: first nut 211: second male thread

212: first facing surface 212a: groove

220: second nut 221: second female thread

222: second facing side 222a: protrusion

221a: Female thread for preventing loosening

Claims

A bolt comprising a first male thread;

A first nut having a first female thread screwed to the first male thread of the bolt and having a second male thread formed on an outer circumferential surface thereof in a direction opposite to the first male thread;

A second female thread screwed with the second male screw thread of the first nut is formed, and a second anti-threaded female screw thread having a first male thread screwed through the first female screw thread is formed at the center thereof. Nut: Consists of including,

The bone depth of the anti-loosening female thread is formed deeper than the bone depth of the first male thread and is configured to generate a gap between the first male thread and the anti-loosening female thread, and a gap is generated between the first female thread and the first male thread. Bolt assembly having an anti-loosening nut, characterized in that not configured.
The method of claim 1,

A bolt assembly having an anti-loosening nut, characterized in that grooves and protrusions are formed on opposite surfaces of the first nut and the second nut facing each other.
The method of claim 2,

The grooves and the projections, each bolt assembly having an anti-loosening nut, characterized in that formed alternately at regular intervals in the circumferential direction of the anti-loosening nut.
The method according to any one of claims 1 to 3,

And a pitch of the second male thread and a pitch of the second female thread are shorter than the pitch of the first male thread.
The method of claim 4, wherein

The loosening nut is composed of n-square,

And the second nut is configured to be rotated 1 / n through a clearance between the first male thread and the second male thread pitch of the first nut.